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Lookup NU author(s): Dr Mehmet KulanORCiD,
Dr Nick BakerORCiD
This is the authors' accepted manuscript of an article that has been published in its final definitive form by IET, 2019.
For re-use rights please refer to the publisher's terms and conditions.
Compression of windings is known to give thermal and performance benefits. The aim here is to investigate how the health of stator winding insulation systems are influenced by on-tooth coil pressing. A set of compressed coils have been aged by exposing them to high temperatures. Winding insulation resistance (IR) was monitored during this process to experimentally validate whether compressed coils remained healthy in terms of electrical insulation. In this case, a single stress (i.e. temperature) model is used to predict the reliability of the compressed coils. Accelerated life tests have been conducted to inspect the life expectancy and thermal endurance of the compressed stator coils. The employed statistical model (Arrhenius- Weibull) demonstrates that on-tooth coil pressing reduces the life expectancy dramatically due to reduced turn to ground wall insulation dielectric strength.
Author(s): Kulan MC, Baker NJ
Publication type: Article
Publication status: Published
Journal: IET Electric Power Applications
Print publication date: 01/09/2019
Online publication date: 15/03/2019
Acceptance date: 12/03/2019
Date deposited: 11/04/2019
ISSN (print): 1751-8660
ISSN (electronic): 1751-8679
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